feat: gemini models support use line file

[fatelei]

issue langgenius/dify#31082

Related Issues or Context

This PR contains Changes to Non-Plugin

• Documentation
• Other

This PR contains Changes to Non-LLM Models Plugin

• I have Run Comprehensive Tests Relevant to My Changes

This PR contains Changes to LLM Models Plugin

• My Changes Affect Message Flow Handling (System Messages and User→Assistant Turn-Taking)

• My Changes Affect Tool Interaction Flow (Multi-Round Usage and Output Handling, for both Agent App and Agent Node)

• My Changes Affect Multimodal Input Handling (Images, PDFs, Audio, Video, etc.)

• My Changes Affect Multimodal Output Generation (Images, Audio, Video, etc.)

• My Changes Affect Structured Output Format (JSON, XML, etc.)

• My Changes Affect Token Consumption Metrics

• My Changes Affect Other LLM Functionalities (Reasoning Process, Grounding, Prompt Caching, etc.)

• Other Changes (Add New Models, Fix Model Parameters etc.)

Version Control (Any Changes to the Plugin Will Require Bumping the Version)

• I have Bumped Up the Version in Manifest.yaml (Top-Level Version Field, Not in Meta Section)

Dify Plugin SDK Version

• I have Ensured dify_plugin>=0.3.0,<0.6.0 is in requirements.txt (SDK docs)

Environment Verification (If Any Code Changes)

Local Deployment Environment

• Dify Version is: , I have Tested My Changes on Local Deployment Dify with a Clean Environment That Matches the Production Configuration.

SaaS Environment

• I have Tested My Changes on cloud.dify.ai with a Clean Environment That Matches the Production Configuration

[gemini-code-assist]

Summary of Changes

Hello @fatelei, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the Gemini model configurations by introducing a new option for file handling. Users can now specify whether to embed files directly into the request for improved performance or to continue using the existing Files API for uploads. This provides greater control over how multimodal inputs are processed by the Gemini models.

Highlights

• New File Handling Option for Gemini Models: A new boolean parameter, use_inline_file, has been added to all Gemini LLM model configurations. This parameter allows users to choose between embedding files directly in the request (inline mode) for better performance or uploading them using the Files API.
• Default Behavior: The use_inline_file parameter defaults to false, meaning files will continue to be uploaded via the Files API unless explicitly enabled for inline embedding.
• Version Bump: The Gemini plugin version has been updated from 0.7.4 to 0.7.5 in models/gemini/manifest.yaml to reflect these changes.

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[gemini-code-assist]

Code Review

This pull request adds a use_inline_file parameter to many Gemini model configurations, allowing a choice between inline file embedding and using the Files API. The change is applied consistently across all relevant files.

My main feedback is regarding the significant configuration duplication across dozens of YAML files. This creates a long-term maintenance challenge. I've left a specific comment with suggestions on how this could be improved in the future using templating or other configuration management techniques.

Additionally, please consider fixing the typo in the PR title ("line" -> "inline") and updating the checkboxes in the PR description to accurately reflect that this is a change to an LLM plugin affecting multimodal input handling.

Overall, a good feature addition that would be even better with the suggested improvements.